M&S says

Refine your table setting with our classic pure cotton napkins. Diners will be sure to appreciate the sophisticated touch offered up by these napkins that, thanks to a plain design, will look great on any table. These machine washable napkins also benefit from a hassle free Non Iron finish so they can stay looking crisp, smooth and ready to go for any occasion. Available in a pack of four, the Nova napkins are great for small get together and larger dinner parties alike.